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toPartial(): PartialLens

ts
toPartial: <A>() => PartialLens<NonNullable<A>, A>;
ts
toPartial: <A>() => PartialLens<NonNullable<A>, A>;

This combinator, when passed to composed with an optic focused on a nullable type, returns a new partial optic focused on the non-nullable type.

ts
import { toPartial } from "@optics/react/combinators";
 
const numberOptic = createState<number | null>(42);
 
const partialNumberOptic = numberOptic.derive(toPartial());
              
const partialNumberOptic: Optic<number, partial>
ts
import { toPartial } from "@optics/react/combinators";
 
const numberOptic = createState<number | null>(42);
 
const partialNumberOptic = numberOptic.derive(toPartial());
              
const partialNumberOptic: Optic<number, partial>